[Webkit-unassigned] [Bug 188150] New: Match in group of selectors forgotten when group contains more than one negation pseudo-class selectors (:not())

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=188150

            Bug ID: 188150
           Summary: Match in group of selectors forgotten when group
                    contains more than one negation pseudo-class selectors
                    (:not())
           Product: WebKit
           Version: Safari Technology Preview
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: CSS
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: code at daniel.priv.no

Created attachment 346037

  --> https://bugs.webkit.org/attachment.cgi?id=346037&action=review

Test case demonstrating the issue

Please see the attached test case. There shouldn’t be any visible red.

In the test, WebKit should find a match in the first rule; but the match is subsequently ignored when the second rule doesn’t match. The test case work in recent versions of Chrome, Edge, and Firefox.

Issue present in Safari 11 and 12, and in GNOME Web (Epiphany) 3.28.

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